/Engine/Plugins/Experimental/PCG/Source/PCG/Public/PCGNode.h
Allow to change the name of a pin, to keep edges connected. You need to make sure that the underlying settings are also updated, otherwise, it will be overwritten next time the settings are updated
void RenameInputPin ( const [FName](API\Runtime\Core\UObject\FName) & InOldLabel, const [FName](API\Runtime\Core\UObject\FName) & InNewLabel, bool bInBroadcastUpdate )